← single night · whole-night plan
Which nights are best for a target over the coming weeks. The astronomy mark (darkness × altitude × Moon) is computed for every night; the weather and the overall mark exist only where Open-Meteo has a forecast (the next four days) or ERA5 history (past nights) — the rest is honestly blank.
| night of | astronomy | weather | overall | best window | highest | dark h | Moon | Moon sep. |
|---|---|---|---|---|---|---|---|---|
| 2044-05-19 Thu | 0 | — | unknown | — | 79.2° 11:05 | 5.34 | 52% | 68.5° |
| 2044-05-20 Fri | 0 | — | unknown | — | 79.2° 11:00 | 5.29 | 42% | 56.5° |
| 2044-05-21 Sat | 0 | — | unknown | — | 79.2° 10:55 | 5.24 | 32% | 44.5° |
| 2044-05-22 Sun | 0 | — | unknown | — | 79.2° 10:50 | 5.19 | 23% | 32.5° |
| 2044-05-23 Mon | 0 | — | unknown | — | 79.2° 10:45 | 5.14 | 14% | 21.6° |
| 2044-05-24 Tue | 0 | — | unknown | — | 79.2° 10:45 | 5.1 | 7% | 15.7° |
| 2044-05-25 Wed | 0 | — | unknown | — | 79.2° 10:40 | 5.05 | 2% | 20.8° |
| 2044-05-26 Thu | 0 | — | unknown | — | 79.2° 10:35 | 5.01 | 0% | 32.5° |
| 2044-05-27 Fri | 0 | — | unknown | — | 79.2° 10:30 | 4.97 | 1% | 46.2° |
| 2044-05-28 Sat | 1 | — | unknown | — | 79.2° 10:30 | 4.92 | 5% | 60.4° |
| 2044-05-29 Sun | 1 | — | unknown | — | 79.2° 10:25 | 4.88 | 11% | 74.7° |
| 2044-05-30 Mon | 1 | — | unknown | — | 79.2° 10:20 | 4.85 | 20% | 88.9° |
| 2044-05-31 Tue | 1 | — | unknown | — | 79.2° 10:15 | 4.81 | 30% | 102.7° |
| 2044-06-01 Wed | 1 | — | unknown | — | 79.2° 10:10 | 4.77 | 41% | 116.0° |
| 2044-06-02 Thu | 1 | — | unknown | — | 79.2° 10:10 | 4.74 | 52% | 128.8° |
| 2044-06-03 Fri | 1 | — | unknown | — | 79.2° 10:05 | 4.7 | 62% | 141.0° |
| 2044-06-04 Sat | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.2° 10:00 | 4.67 | 72% | 152.1° |
| 2044-06-05 Sun | 2 | — | unknown | 04:30–04:35 (marginal, 0.08 h) | 79.2° 09:55 | 4.64 | 80% | 161.0° |
| 2044-06-06 Mon | 2 | — | unknown | 04:25–04:30 (marginal, 0.08 h) | 79.2° 09:50 | 4.62 | 88% | 164.3° |
| 2044-06-07 Tue | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:50 | 4.59 | 93% | 159.3° |
| 2044-06-08 Wed | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:45 | 4.56 | 97% | 150.1° |
| 2044-06-09 Thu | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:40 | 4.54 | 99% | 139.6° |
| 2044-06-10 Fri | 2 | — | unknown | 04:20–04:30 (marginal, 0.17 h) | 79.2° 09:35 | 4.52 | 100% | 128.6° |
| 2044-06-11 Sat | 3 | — | unknown | 04:15–04:30 (marginal, 0.25 h) | 79.2° 09:30 | 4.5 | 98% | 117.4° |
| 2044-06-12 Sun | 3 | — | unknown | 03:30–03:40 (marginal, 0.17 h) | 79.2° 09:30 | 4.48 | 95% | 106.1° |
| 2044-06-13 Mon | 3 | — | unknown | 03:30–03:40 (marginal, 0.17 h) | 79.2° 09:25 | 4.47 | 90% | 94.7° |
| 2044-06-14 Tue | 3 | — | unknown | 03:25–03:40 (marginal, 0.25 h) | 79.2° 09:20 | 4.46 | 84% | 83.2° |
| 2044-06-15 Wed | 4 | — | unknown | 03:20–03:40 (marginal, 0.33 h) | 79.2° 09:15 | 4.45 | 76% | 71.6° |
| 2044-06-16 Thu | 4 | — | unknown | 03:20–03:40 (marginal, 0.33 h) | 79.2° 09:15 | 4.44 | 68% | 59.9° |
| 2044-06-17 Fri | 5 | — | unknown | 03:15–03:40 (marginal, 0.42 h) | 79.2° 09:10 | 4.43 | 58% | 48.1° |
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&date=2044-05-19&days=30"
curl -sS "https://devops.majbase.com/rozhen-planner/calendar-api?target=M31&days=30&format=csv" -o m31-calendar.csvOne row per night: score_astronomy always, score_weather / score only where a forecast or history exists (null otherwise, with weather_source saying which), best window, dark hours, Moon illumination and separation, transit. 7–60 nights. Errors: 400 with invalid_date or target_unresolved. Results are cached for six hours; calculation version 2026-10-10.1.